JP5127070B2 - Fin exchanger for heat exchanger - Google Patents

Description

The present invention relates to a jig for correcting the bending of fins of a heat exchanger constituting a refrigerator unit cooler , for example.

A heat exchanger applied to a conventional refrigerator unit cooler has a large number of plate-like fins arranged side by side with a narrow gap, and these fins pass through a heat exchange pipe and end portions of the fins. The portion projecting from is bent in a U shape and communicated in a meandering manner (see, for example, Patent Document 1).

JP-A-10-132325

Although the specific configuration of the heat exchanger is not described in Patent Document 1, generally, an aluminum thin plate having a thickness of 0.1 to 0.2 mm is used for the fin, and a gap of about 10 mm exists. Hundreds of them are arranged side by side. Then, when installing or inspecting the refrigerator unit cooler , the operation of opening the housing of the heat exchanger is accompanied. At this time, if a tool or the like touches the fin, the end portion of the fin is easily bent. And if the fin edge part side is bent, the water at the time of defrosting cannot be smoothly dropped to a drain pan, it causes root ice, and heat exchange capability will fall.
Therefore, the operator uses the flat nose pliers to repair several tens to hundreds of bent portions on the fin end side one by one, increasing the work load and working time. There was a problem of becoming longer.

  The present invention has been made in order to solve the above-described problems, and can bend the bending of a plurality of fin end portions at once and can bend the fin end portions of heat exchangers having different fin pitches. The object is to obtain a heat exchanger fin reworking jig that can also be used for reworking.

  The heat exchanger fin reworking jig according to the present invention is a heat refining pipe that is configured to pass through a large number of fins arranged at a predetermined pitch. A guide rod having a predetermined length, a plurality of base portions mounted on the guide rod so as to be slidable in the length direction, and a fastening portion for fastening and fixing each of the plurality of base portions to the guide rod. A pair of wall surfaces provided on each of the attachment means and each of the plurality of bases, perpendicular to the length direction of the guide rod and facing each other with a predetermined gap in the length direction of the guide rod; A shaping part that inserts the end part side of the fin to shape the bending of the end part side of the fin, and a gap in the length direction of the guide rod extends in a mouth opening shape that gradually expands from the end part of the shaping part , Guide the end of the fin to the shaping part Comprising a reworking unit having a guide unit.

  According to the present invention, since the plurality of base portions having the correcting portions are attached to the guide portion, the bending of the fin end portions of the plurality of fins can be corrected at a time, the work load is reduced, and the working time is shortened. it can. Furthermore, if the fastening by the fastening means is loosened, the base is slid to adjust the pitch of the base to the arrangement pitch of the fins, and then the fastening means is fastened to fix the base to the guide rod, the fin pitch It can also be applied to reworking the bending of the fin end side of different heat exchangers.

It is a front view which shows the structure of a heat exchanger typically. It is a figure explaining the structure of the fin repair jig for heat exchangers concerning one embodiment of this invention. It is a principal part side part which shows the bending state of the fin edge part side in a heat exchanger. It is a figure explaining the method of correcting the bending of the fin edge part side using the fin repair jig which concerns on one embodiment of this invention. It is a figure explaining the method of correcting the bending of the fin edge part side using the fin repair jig which concerns on one embodiment of this invention. It is a figure explaining the method of correcting the bending of the fin edge part side using the fin repair jig which concerns on one embodiment of this invention.

  First, prior to describing the heat exchanger fin repair jig of the present application, the structure of the heat exchanger will be described with reference to FIG. 1 in order to clarify the features of the present application.

FIG. 1 is a front view schematically showing the configuration of the heat exchanger.
In FIG. 1, the fins 2 are made of aluminum thin plates of 0.1 mm to 0.2 mm formed in a predetermined shape, and several hundreds of fins 2 are arranged in parallel at intervals of 10 mm, for example. A plurality of heat exchange pipes 3 are each made of a good heat conductive material such as copper, and are disposed through the fins 2 in the direction in which the fins 2 are juxtaposed. Further, each heat exchange pipe 3 is connected in a meandering manner by a connecting pipe 4 whose ends are bent in a U shape.

In the heat exchanger 1 configured as described above, as indicated by an arrow in FIG. 1, the refrigerant circulates in the heat exchange pipe 3 connected in a meandering manner, and the refrigerator unit cooler suction air is passed through the fins 2. And heat exchange.
And since the fin 2 is comprised with the aluminum thin plate, it will deform | transform if a tool etc. touch at the time of installation of a refrigerator unit cooler , or an inspection. And if the edge part side of the fin 2 is bent, the water at the time of defrosting cannot be smoothly dropped to a drain pan, it causes root ice, and the heat exchange capability falls.

  Next, the configuration of the heat exchanger fin reworking jig of the present invention will be described with reference to FIG. 2A and 2B are views for explaining the configuration of the heat exchanger fin reworking jig according to the embodiment of the present invention. FIG. 2A is a side view and FIG. 2B is a front view.

  In FIG. 2, the fin reworking jig 10 is formed in a cylindrical body having a predetermined length, and is extended in the length direction on the outer periphery of the guide bar 11 having a grip portion 12 formed at one end and the guide bar 11. The guide rails 13 and the guide rods 15 that are respectively fitted into the guide rods 11 are fitted into the guide rails 13 and are recessed in the inner peripheral surface thereof. From the base 14 slidably mounted in the length direction, a fastening bolt 16 that is screwed to the base 14 to fasten and fix the base 14 to the guide rod 11, and an outer peripheral surface of the base 14 And a fin retouching portion 17 erected. Note that an aluminum material is used for the guide rod 11, the base portion 14, and the like to reduce weight.

  Here, the fin retouching portion 17 is produced by bending a rectangular flat plate made of a metal material such as stainless steel, and the surface of the rectangular flat plate is orthogonal to the length direction of the guide rod 11 and is relatively spaced with a predetermined gap. Then, the shaping portion 18 erected from the outer peripheral surface of the base portion 14 and the guide portion extended in a mouth shape in which the gap in the length direction of the guide rod 11 gradually expands from the distal end portion of the shaping portion 18. 19. And, for example, the gap between a pair of opposing wall surfaces constituting the shaping portion 18 is 1 mm, the standing height is 2 cm, the gap in the length direction of the guide rod 11 at the tip of the guide portion 19 is 2 mm, The extended length is set to 1 cm, respectively.

  When the fin reworking jig 10 configured in this way loosens the fastening of each fastening bolt 16, the base portion 14 is fitted around the guide rail 13 and the guide groove 15, so that the base 14 rotates around the axis of the guide rod 11. Rotation is restricted and sliding movement is possible in the length direction.

  Next, a method for correcting the bending of the fin 2 using the fin correcting jig 10 will be described with reference to FIGS. FIG. 3 is a side view of a main part showing a bent state of the fin end side in the heat exchanger, and FIGS. 4 to 6 are each a bent side of the fin end using the fin repair jig according to the embodiment of the present invention. It is a figure explaining the method of reworking.

  First, as shown in FIG. 3, it is assumed that the end of the fin 2 of the heat exchanger 1 is bent. Therefore, the operator loosens the fastening bolt 16, slides the base 14, adjusts the pitch of the fin reworking portion 17 to the arrangement pitch of the fins 2, and then fastens the fastening bolt 16. The base 14 is fixed to the guide rod 11.

  Next, the operator holds the grip portion 12 and brings the fin reworking jig 10 closer to the heat exchanger 1 so that the end portion of the fin 2 enters each guide portion 19 as shown in FIG. As the fin reworking jig 10 approaches the heat exchanger 1, first, the end of each fin 2 comes into contact with the inclined surface of the guide portion 19 as shown in FIG. Next, the end portion of each fin 2 is plastically deformed as shown in FIG. 5B, and the end portion of each fin 2 moves to the shaping portion 18 side along the slope of the guide portion 19.

  Then, the end of the fin 2 that has reached the shaping portion 18 is inserted into the shaping portion 18 as shown in FIG. 6A, and finally, as shown in FIG. It reaches near the bottom of the part 18. At this time, the bent end side of the fin 2 moves to the bottom side while contacting the inner wall surface of the shaping portion 18, and the bent portion is shaped.

  Next, the operator pulls out the fin reworking jig 10 from the laminated body of the fins 2, moves it in the laminating direction of the fins 2, and refolds the next five fins 2 in the same manner. The bending and reworking operation of the fins 2 is repeated, and the bending of all the fins 2 of the heat exchanger 1 is repaired.

  The fin reworking jig 10 has a pair of wall surfaces that are orthogonal to the length direction of the guide rod 11 and are opposed to each other with a predetermined gap in the length direction of the guide rod 11, and the end portion side of the fin 2 is inserted. And the shaping portion 18 for shaping the bend on the end portion side of the fin 2 and the gap in the length direction of the guide rod 11 are extended from the tip portion of the shaping portion 18 in a mouth-opening shape so that the end of the fin 2 The retouching part 17 which has the guide part 19 which guides a part to the shaping part 18 is provided. Therefore, the end of the fin 2 is guided to the guide portion 19 and moved to the shaping portion 18 simply by moving the fin reworking jig 10 to the fin 2 side so that the end of the fin 2 is positioned in the guide portion 19. It is guided and inserted into the shaping part 18, and the bent side of the fin 2 is shaped as it advances through the shaping part 18. Thus, if the fin reworking jig 10 is used, the bending of the fin 2 can be easily reworked.

  The fin reworking jig 10 includes a guide bar 11, a reworking part 17 erected, and five base parts 14 that are slidably mounted on the guide bar 11 in the length direction thereof, and each base part 14. And fastening bolts 16 for fastening and fixing to the guide rod 11. Therefore, the bending of the five fins 2 can be corrected at a time, the work load is reduced, and the work time is shortened. Furthermore, since the arrangement pitch of the base portions 14 can be changed, it is possible to cope with the heat exchanger 1 having a different fin pitch with one fin reworking jig 10 and excellent versatility.

  In the fin reworking jig 10, the guide rail 13 is formed on the guide rod 11, and the guide groove 15 fitted to the guide rail 13 is recessed in the inner peripheral surface of the base portion 14. The rotation about the axis 11 is restricted. Therefore, when adjusting the arrangement pitch of the base portions 14, the base portion 14 is not rotated, so that the position adjustment work of the base portion 14 is simplified.

In the above embodiment, the guide rail is formed on the outer peripheral surface of the guide rod, and the guide groove to be fitted to the guide rail is recessed in the inner peripheral surface of the base portion to restrict the rotation of the base portion. The means for restricting the rotation of the base is not limited to this configuration. For example, the guide rod may be formed in a polygonal outer shape, and the base may be formed in an inner shape that matches the outer shape of the guide rod. Good.
In the above embodiment, the five bases are slidably attached to the guide rod. However, it goes without saying that the number of bases attached to the guide rod is not limited to five. .

  In the above-described embodiment, the retouching portion is formed by bending two metal plates. However, the retouching portion is not limited to this configuration, for example, a rectangular parallelepiped metal block A shaping portion having a pair of wall surfaces that are orthogonal to the length direction of the guide rod and are opposed to each other with a predetermined gap in the length direction of the guide rod, and a gap in the length direction of the guide rod. You may form the guide part extended in the opening shape which expands gradually from the edge part of the shaping part. In this case, the shaping portion and the guide portion are open in a direction orthogonal to the length direction of the guide rod.

  DESCRIPTION OF SYMBOLS 1 Heat exchanger, 2 fin, 3 heat exchange pipe, 10 fin repair jig, 11 guide rod, 14 base, 16 fastening bolt (fastening means), 17 repair part, 18 shaping part, 19 guide part.

Claims (1)

A jig for correcting the bending of the fin end side of the heat exchanger configured so that the heat exchange pipe penetrates a large number of fins arranged at a predetermined pitch,
A guide bar having a predetermined length;
A plurality of bases mounted on the guide rod so as to be slidable in the length direction;
Fastening means for fastening and fixing each of the plurality of bases to the guide rod;
An end portion of the fin provided on each of the plurality of base portions, having a pair of wall surfaces orthogonal to the length direction of the guide rod and facing each other with a predetermined gap in the length direction of the guide rod; A shaping portion that inserts the side and shapes the bend on the end portion side of the fin, and a gap in the length direction of the guide rod extends from the end portion of the shaping portion so as to gradually widen. A rework portion having a guide portion for guiding the end portion to the shaping portion;
A fin reworking jig for a heat exchanger, comprising:

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