JP2007040680A - Heat exchanger and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive and reliable heat exchanger extremely easy to manufacture while retaining extremely excellent heat exchanging performance. <P>SOLUTION: The method for manufacturing a heat exchanger comprises a recess 20 processing step, a dent 30 processing process for forming a substantially parallel slit 30 on a flat surface each between recesses 20, a step for laminating a plurality of substrates 10 processed by the recess 20 processing step and the slit 30 processing step so that the slits 30 are overlapped to form a heat exchanger core in which the recesses 20 constitute a pipe inner passage 70 and the slits 30 constitute a pipe outer passage, and a step for mounting headers on both the outer sides of the heat exchanger core. By a recess 20 machining step and a slit 30 machining step for forming a slit 30 substantially parallel on a flat surface between recesses 20 successively to the recess 20 machining step. The heat exchanger can be constituted from the substrates having the recesses 20 and the slits 30, and easily manufactured. The recess 20 processing is performed first, whereby the accuracy of the recess 20 processing is improved because it is processing to the sheet-like substrate 10. Accordingly, a reliable heat exchanger can be manufactured at low cost. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heat exchanger for a cooling system, a heat dissipation system, a heating system, and the like, and more particularly to a heat exchanger used in a system that requires compactness and a manufacturing method thereof.

  Conventionally, this type of heat exchanger is generally composed of tubes and fins. However, in recent years, in order to achieve compactness, the tube diameter and tube pitch are reduced, and the tubes are made dense. It tends to become. As an extreme form thereof, there is one in which the heat exchanging portion is composed only of a very thin tube having a tube outer diameter of about 0.5 mm (for example, see Patent Document 1).

  FIG. 8 is a front view of a conventional heat exchanger described in Patent Document 1. FIG. 9 is a cross-sectional view taken along line AA in FIG.

  In the conventional heat exchanger, an inlet header 1 and an outlet header 2 which are opposed to each other with a predetermined interval, and a plurality of tubes 3 having a circular cross section are arranged between the inlet header 1 and the outlet header 2. A heat exchange core 4 through which an external fluid is circulated is configured. Water or antifreeze is mainly used as an internal fluid that circulates in the pipe 3, and air is mainly used as an external fluid, and each circulates and performs heat exchange.

And while arrange | positioning the pipe | tube 3 in grid shape, the outer diameter of the pipe | tube 3 shall be 0.2 mm or more and 0.8 mm or less, and the value which remove | divided the pitch of the adjacent pipe | tube 3 by the pipe outer diameter is 0.5 or more. By setting it to 5 or less, it is said that the amount of heat exchange for the power used can be greatly improved.
JP 2001-116481 A

  Although the specific elements and manufacturing method constituting the conventional heat exchanger are not shown, in general, a large number of thin tubes 3 and a large number of fine circular holes on a specific surface are previously opened. There is a method in which the header 1 and the outlet header 2 are prepared, both ends of the pipe 3 are inserted into the circular holes of the inlet header 1 and the outlet header 2, and the insertion portion of the pipe 3 is bonded to the inlet header 1 and the outlet header 2 by welding or the like. Conceivable.

  However, not only the long and thin tube 3 is very expensive, but also a very small number of holes for inserting the tube 3 in the inlet header 1 and the outlet header 2 are provided at a predetermined fine pitch, The process of inserting and bonding the tube 3 into the inlet header 1 and the outlet header 2 is very difficult, and even if the heat exchange performance is high, there is a problem that it is very expensive and has low reliability against leakage. It was.

  The present invention solves the above-described conventional problems, and provides a method for manufacturing a heat exchanger that can be manufactured very easily while maintaining extremely excellent heat exchange performance. It aims at providing a heat exchanger with high property.

  In order to solve the above-described conventional problems, a method for manufacturing a heat exchanger according to the present invention includes a recess processing step of forming recesses on a flat substrate at a predetermined interval, and the recess processing step of the substrate. A slit processing step of forming a slit that is substantially parallel to the recess on the plane between the recesses, and a plurality of the substrates are laminated so that the slits overlap, and the recess constitutes an in-tube flow path, The slit comprises a step of forming a heat exchanger core that constitutes a flow path outside the tube, and a step of attaching headers to both outer sides of the heat exchanger core.

  Thereby, the heat exchanger core comprised only with the pipe | tube can be comprised from the board | substrate which provided the dent and the slit, and can be manufactured easily. In addition, if slit processing is performed first, dent processing will be performed after forming the outer shape of the thin tube, and the accuracy of the dent processing will decrease due to bending or distortion of the thin tube, but by performing the dent processing first, a flat plate shape Therefore, the accuracy of the dent processing is improved. Therefore, it is possible to manufacture a heat exchanger that is inexpensive and highly reliable.

  In addition, the method for manufacturing a heat exchanger according to the present invention includes a recess processing step for forming recesses on a planar substrate at a predetermined interval, and a plane between the recesses substantially simultaneously with the recess processing step for the substrate. Forming a slit substantially parallel to the recess, laminating a plurality of the substrates so that the slit overlaps, the recess forming an in-tube flow path, and the slit forming an out-tube flow path Forming a heat exchanger core, and attaching a header to both outer sides of the heat exchanger core.

  Thereby, the heat exchanger core comprised only with the pipe | tube can be comprised from the board | substrate which provided the dent and the slit, and can be manufactured easily. Further, by performing slit processing almost simultaneously with the dent processing, it is possible to prevent a reduction in processing accuracy of the dent processing due to bending or distortion of the thin tube, and it is possible to manufacture a heat exchanger that is inexpensive and highly reliable.

  Since the heat exchanger of the present invention is easy to manufacture, the heat exchanger can be provided at low cost.

  Moreover, the manufacturing method of the heat exchanger of this invention can provide a heat exchanger cheaply and highly reliable.

  The invention according to claim 1 is a recess processing step of forming recesses at a predetermined interval in a substrate on a plane, and the recesses on a plane between the recesses following the recess processing step of the substrates. A slit processing step for forming slits that are substantially parallel, and a heat exchanger in which a plurality of the substrates are laminated so that the slits overlap, and the recess constitutes an in-tube flow path, and the slits constitute an external flow path. A step of forming a core and a step of attaching headers to both outer sides of the heat exchanger core, and the heat exchanger core constituted only by tubes is constituted by a substrate provided with a recess and a slit. Can be manufactured easily. In addition, if slit processing is performed first, dent processing will be performed after forming the outer shape of the thin tube, and the accuracy of the dent processing will decrease due to bending or distortion of the thin tube, but by performing the dent processing first, a flat plate shape Therefore, the accuracy of the dent processing is improved. Therefore, it is possible to manufacture a heat exchanger that is inexpensive and highly reliable.

  According to a second aspect of the present invention, there is provided a recess processing step of forming recesses at a predetermined interval in a substrate on a plane, and the recesses on a plane between the recesses substantially simultaneously with the recess processing step of the substrate. A slit processing step for forming slits that are substantially parallel, and a heat exchanger in which a plurality of the substrates are stacked so that the slits overlap, and the recesses form a flow path in the pipe, and the slits form a flow path in the pipe A step of forming a core and a step of attaching headers to both outer sides of the heat exchanger core, wherein the heat exchange core constituted only by a tube is constituted by a substrate provided with a recess and a slit. Can be manufactured easily. Further, by performing slit processing almost simultaneously with the dent processing, it is possible to prevent a reduction in processing accuracy of the dent processing due to bending or distortion of the thin tube, and it is possible to manufacture a heat exchanger that is inexpensive and highly reliable.

  According to a third aspect of the present invention, the dent of the first or second aspect of the invention is processed by transferring the shape of the mold, and the shape of the dent can be processed with high accuracy and reliability. High heat exchanger can be manufactured.

  The invention described in claim 4 is obtained by heating at least one of the substrate and the mold according to the invention described in claim 3, and the mold shape is easily transferred, the processing accuracy is improved and the processing man-hours are improved. The heat exchanger can be manufactured at low cost.

  According to a fifth aspect of the present invention, the slit according to the first or fourth aspect of the present invention is processed by pressing, and the slit shape can be processed with high accuracy, and is inexpensive and highly reliable. A heat exchanger can be manufactured.

  In the invention according to claim 6, the slit of the invention according to claim 1 or 4 is processed by a roller cutter, the slit shape can be continuously processed, and the number of processing steps can be reduced. A heat exchanger can be manufactured at low cost.

  In the invention according to claim 7, the material of the substrate according to any one of claims 1 to 6 is a resin material, and it is easy to perform dent processing and slit processing, and the processing man-hour can be reduced. The material cost is also low, and the heat exchanger can be provided at low cost.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
1 is a perspective view of a manufacturing process of a substrate of a heat exchanger according to Embodiment 1 of the present invention. FIG. 2 is a perspective view of a heat exchanger core of the heat exchanger in the same embodiment. FIG. 3 is a perspective view of the heat exchanger in the same embodiment.

  The substrate 10 is processed with a recess 20 at a predetermined interval and a slit 30 on the plane between the recesses 20 so as to be substantially parallel to the recess 20.

  In the present embodiment, the substrate 10 is molded into a sheet shape from a resin material such as ABS, PC, PP or the like.

  First, the mold 40 for transferring the shape of the recess 20 is pressed against the substrate 10 to transfer the shape of the recess 20 (step (1), step (2), step (3)).

  At this time, shape transfer is facilitated by heating the substrate 10 to the vicinity of the softening point.

  Next, the slit 30 is processed by the roller cutter 50 (step (4), step (5), step (6)). Since the roller cutter 50 can process continuously, the number of processing steps can be reduced.

  The slit 30 penetrates the upper surface and the lower surface of the substrate 10.

  In the roller cutter 50, teeth 32 having the same shape as the slit 30 are processed on the circumference of the roller 35, and the slit 30 is formed by the roller 35 rotating on the substrate 10. In addition, the board | substrate 10 can be manufactured without dividing | segmenting a pipe | tube by providing the location 37 which has not processed the tooth | gear 32 on the roller 35 periphery.

  In the present embodiment, one tooth 32 is received on the circumference of the roller 35. However, the diameter of the roller 35 may be increased, and a plurality of teeth 32 may be provided across a portion 37 where the tooth 32 is not processed. .

  In addition, although the board | substrate 10 was heated to the softening point vicinity, you may heat the type | mold 40 to the softening point vicinity.

  In addition, in this Embodiment, although the slit 30 was processed with the roller cutter 50, when it processes with a press, a slit shape can be processed with sufficient precision and a heat exchanger cheaply and highly reliable is manufactured. be able to.

  The substrates 10 processed in this way are stacked and joined together to produce the heat exchanger core 11.

  As a bonding method, an adhesive, thermocompression bonding, heat welding, ultrasonic bonding, diffusion bonding, and the like are conceivable, but it is sufficient that the dent 20 is not clogged. At this time, the substrate 60 not provided with the recess 20 is stacked at the end in the stacking direction, and the in-pipe flow path 70 at the end is sealed.

  In this embodiment, the end pipe passage 70 is sealed as described above, but the present invention is not limited to this.

  Next, as shown in FIG. 3, headers 80 are attached to both ends of the in-pipe flow path 70 to complete the heat exchanger.

  In addition, the material of the substrate is a resin material, and it is easy to perform dent processing and slit processing, and the number of processing steps can be reduced, and the material cost is low, and a heat exchanger can be provided at low cost.

  In the heat exchanger manufactured as described above, the recess 20 becomes the in-tube flow path 70, the refrigerant such as water and antifreeze liquid flows, the slit 30 becomes the external pipe flow path 90, the air etc. flows, the refrigerant and heat Exchange.

  At this time, since the recess 20 serving as the in-tube flow path 70 is processed by transferring the shape of the mold 40, the tube can be processed into a fine shape, and the performance of the heat exchanger can be improved.

  As described above, if slitting is performed first, the outer shape of the thin tube is formed and then the dent processing is performed, and the accuracy of the dent processing decreases due to bending or distortion of the thin tube. By processing the recess 20 first, the flat substrate 10 is processed, so that the accuracy of the recess 20 processing is improved.

  Further, since the recess 20 is processed by transferring the shape of the mold 40 by heating, even a fine shape can be processed with high accuracy. Therefore, a heat exchanger with high reliability can be manufactured easily.

  Further, by processing the slit 30 with the roller cutter 50, the number of processing steps of the slit 30 shape can be reduced.

(Embodiment 2)
FIG. 4 is a perspective view of the manufacturing process of the substrate of the heat exchanger according to Embodiment 2 of the present invention. FIG. 5 is a front view of the manufacturing process of the substrate of the heat exchanger in the same embodiment. FIG. 6 is a perspective view of a heat exchanger core in the heat exchanger according to the embodiment, and FIG. 7 is a perspective view of the heat exchanger according to the embodiment.

  As in the first embodiment, the substrate 110 is processed with a recess 120 and a slit 130.

  In the present embodiment, the substrate 110 is molded into a sheet shape from a resin material such as ABS, PC, PP, or the like.

  The mold 140 is provided with a protrusion shape 141 for forming the recess 120 and a protrusion shape 142 for forming the slit 130. The mold 140 is pressed against the substrate 110 to transfer the shape of the recess 120 and process the slit 130. (Step (7), step (8), step (9)).

  The slit 130 passes through the upper surface and the lower surface of the substrate 110.

  Next, the heat exchanger core 111 is manufactured by laminating the substrates 110 and bonding them together.

  As a bonding method, an adhesive, thermocompression bonding, thermal welding, ultrasonic bonding, diffusion bonding, and the like are conceivable, but the recess 120 may not be clogged.

  At this time, the substrate 110a at the stacking direction end seals the in-tube flow path 170 by stacking and bonding in a direction in which the substrate 110a abuts the recess 120 of the immediately preceding substrate 110b.

  In the present embodiment, the pipe flow path 170 at the end is sealed in this way, but the present invention is not limited to this.

  Next, as shown in FIG. 6, headers 180 are attached to both ends of the in-tube flow path 170 to complete the heat exchanger.

  In the heat exchanger manufactured as described above, the recess 120 becomes the in-tube flow path 170, the coolant such as water or antifreeze flows, the slit 130 becomes the external flow path 190, the air flows, and the refrigerant and heat. Exchange. At this time, the recess 120 serving as the in-tube flow path 170 is processed by transferring the shape of the mold 140, and the slit 130 is processed at the same time. Therefore, the tube can be processed into a fine shape, and the performance of the heat exchanger can be improved. Further, since the man-hours for processing the recess 120 and the slit 130 can be reduced, a heat exchanger can be manufactured at low cost.

  As described above, in the present embodiment, by processing the slit 130 at the same time as processing the recess 120, the processing accuracy of both the recess 120 and the slit 130 can be improved and the number of processing steps can be reduced. The heat exchanger can be provided at a lower cost.

  As described above, the heat exchanger according to the present invention can be realized at low cost while maintaining very excellent heat exchange performance, such as heat exchangers for refrigeration equipment and air conditioning equipment, waste heat recovery equipment, etc. It can also be applied to applications.

The perspective view of the manufacturing process of the board | substrate of the heat exchanger in Embodiment 1 of this invention The perspective view of the heat exchanger core of the heat exchanger in the embodiment The perspective view of the heat exchanger in the same embodiment The perspective view of the manufacturing process of the board | substrate of the heat exchanger in Embodiment 2 of this invention The front view of the manufacturing process of the board | substrate of the heat exchanger in the embodiment The perspective view of the heat exchanger core of the heat exchanger in the embodiment The perspective view of the heat exchanger in the same embodiment Front view of conventional heat exchanger AA line sectional view of FIG.

Explanation of symbols

10, 60, 110, 110a, 110b Substrate 11, 111 Heat exchanger core 20, 120 Recess 30, 130 Slit 40, 140 Type 50 Roller cutter 70, 170 In-pipe channel 80, 180 Header 90, 190 Out-pipe channel

Claims (7)

  A recess forming step for forming recesses at a predetermined interval in a substrate on a plane, and a slit for forming a slit substantially parallel to the recesses on a plane between the recesses following the recess processing step for the substrate. A step of forming a heat exchanger core in which a plurality of the substrates are laminated so that the slits overlap, the recesses form a flow path in the tube, and the slits form a flow path in the tube, and the heat A method of manufacturing a heat exchanger, comprising: attaching headers to both outer sides of the in-pipe flow path of the exchanger core.   A recess forming step for forming recesses at a predetermined interval on a substrate on a plane, and a slit for forming a slit substantially parallel to the recesses on the plane between the recesses substantially simultaneously with the recess processing step for the substrate. A step of forming a heat exchanger core in which a plurality of the substrates are laminated so that the slits overlap, the recesses form a flow path in the tube, and the slits form a flow path in the tube, and the heat A method of manufacturing a heat exchanger, comprising: attaching headers to both outer sides of the in-pipe flow path of the exchanger core.   The method of manufacturing a heat exchanger according to claim 1, wherein the recess is processed by transferring a mold shape.   The method for manufacturing a heat exchanger according to claim 3, wherein at least one of the substrate and the mold is heated.   The method for manufacturing a heat exchanger according to claim 1 or 4, wherein the slit is processed by a press.   The said slit is a manufacturing method of the heat exchanger of Claim 1 or 4 processed with a roller cutter.   The heat exchanger manufactured by the manufacturing method of the heat exchanger as described in any one of Claim 1 to 6 whose material of the said board | substrate is a resin material.

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