JP2005098672A - Tubeless heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of components and the man-hour for assembling and to reduce the manufacturing cost. <P>SOLUTION: In this tubeless heat exchanger 21, 41, a plurality of flow channels 28 are formed by stacking fins 22 having raised parts 27 along peripheral edge parts of a plurality of through holes 26, and end parts 31 of the flow channels 28 are connected by connecting members 24, 44. As the flow channels 28 are formed by stacking the fins 22, it becomes unnecessary to insert a tube into the through holes 26 of the fins 22, and the number of components and the man-hour for assembling, and the manufacturing cost can be reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a tubeless heat exchanger used in an air conditioner or the like.

  Conventionally, fin coil type heat exchangers are used in air conditioners and the like. As shown in FIG. 9, the fin coil type heat exchanger 1 includes laminated fins 2, side plates 3 provided on both sides of the fins 2, and tubes 4 formed by meandering. It is configured. The fins 2 and the side plates 3 are made of aluminum and have an elongated plate shape, and a plurality of through holes 5 are formed in the fins 2 and the side plates 3 respectively. The peripheral portion of the through hole 5 is provided with a rising portion 6 bent at a right angle by burring, so that the rising portion 6 does not overlap with the rising portions 6 of other adjacent fins 2. . The tube 4 includes a hairpin tube 7 that is bent into an elongated U shape, a U-shaped bend tube 8 that connects adjacent ends thereof, and a conduit 9 that is connected to the end of the hairpin tube 7. It is composed of

  And in order to assemble such a heat exchanger 1, after inserting and fixing the straight tube | pipe part 10 of the hairpin tube 7 to each through-hole 5 of the laminated fin 2 and the side plate 3, the edge part 11 of the hairpin tube 7 is fixed. And the bend tube 8 or the conduit 9 is inserted into the end 11 and brazed (for example, see Patent Document 1).

Japanese Utility Model Publication No. 49-137152

  However, the above-described conventional heat exchanger 1 has a problem that the number of parts and the number of assembly steps are large, and it is difficult to reduce the manufacturing cost.

  Further, since the rising portion 6 of the fin 2 is configured not to overlap with the other rising portion 6, there is a problem that the adjacent fins 2 do not mesh with each other, and the assembling property and the rolling property are poor.

  Furthermore, when changing the diameter and arrangement pitch of the tubes 4, it is necessary to change the size and shape of the hairpin tube 7 and the bend tube 8, which is very time-consuming, so an optimal flow path that matches the required performance is created. There was also a problem that it was difficult.

  The present invention has been made to solve the above-described problems, and can reduce the number of parts and the number of assembly steps, reduce the manufacturing cost, improve the assembling property and the solderability, and the diameter of the flow path. And a tubeless heat exchanger capable of easily changing the arrangement pitch and the like.

  The tubeless heat exchanger according to the present invention forms a plurality of flow paths by laminating fins having rising portions along the respective peripheral edge portions of the plurality of through holes, and the ends of the flow paths are connected to each other by a connecting member. It is characterized by being connected.

  Preferably, the fin and the connecting member are formed of a clad material so as to be integrally brazed.

  Further, the rising portions of the fins may be formed to be inclined toward the flow path so that the rising portions can be polymerized.

  Further, the connecting member may be a bend pipe that connects adjacent ends of the flow path, and the bend pipe has bulges formed at both ends thereof, The tip side portion may be formed in a tapered shape.

  Furthermore, the connecting member is a bend plate that connects adjacent end portions of the flow path, and the bend plate is fixed to the outside of the side plates provided on both sides of the laminated fins. And may be integrated.

  Furthermore, the diameter of each through hole of the fin may be variable, and the arrangement pitch between the through holes of the fin may be variable.

  According to the present invention, since the flow path is formed by laminating the fins and it is not necessary to insert the tube into the through hole of the fin, the number of parts and the number of assembly steps can be reduced, and the manufacturing cost can be reduced. Is possible.

  In addition, if the diameter and arrangement pitch of the fin holes are variable, the flow distribution of the internal fluid can be easily and freely changed according to the pressure loss and circulation rate of the internal fluid, so optimal flow control is possible. In addition, the change of the flow path is not time-consuming and the cost can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a tubeless heat exchanger 21 according to a first embodiment of the present invention. The heat exchanger 21 includes laminated fins 22 and side plates 23 provided on both sides of the fins 22. The bend tube 24 is formed in a U-shape and a straight conduit 25, and each component 22, 23, 24, 25 is made of a clad material clad with a brazing material.

  As shown in FIG. 2, the fin 22 is formed in an elongated plate shape, and includes a plurality of through holes 26 having the same diameter and a uniform pitch, and each through hole 26 has a peripheral portion formed by burring. A rising portion 27 is formed along the edge. As best shown in FIG. 3, the rising portion 27 is inclined toward the flow path 28 formed by laminating the fins 22 so that it can overlap with the rising portions 27 of other adjacent fins 22. Is formed.

  The side plate 23 has an elongated plate shape, and includes through holes 29 formed so as to communicate with the through holes 26 of the fins 22, and these through holes 29 also have rising portions as in the case of the through holes 26 of the fins 22. 30 is formed.

  The bend pipe 24 is formed so as to be able to connect the end portions 31 of the adjacent flow paths 28, and the conduit 25 is formed so as to be connectable to the end 32 of the flow path 28. As shown in FIG. 4, the bend tube 24 may have bulging portions 33 formed at both ends, and the tip side portion 34 of the bulging portion 33 is tapered. May be. In this case, the pressure resistance of the connection portion between the bend pipe 24 and the end portion 31 of the flow path 28 can be improved, and even if a pressurized refrigerant or the like is circulated in the bend pipe 24 or the flow path 28, this connection position. There is no risk of refrigerant leaking from the tank.

  When assembling the tubeless heat exchanger 21 described above, as shown in FIGS. 1 and 3, the fins 22 are stacked, the rising portions 27 of the fins 22 are polymerized, and the stacked fins 22 are stacked. The side plates 23 are polymerized on both sides. Since the rising portions 27 and 30 of the fin 22 and the side plate 23 are formed to be inclined toward the flow path 28 side, the assembling property of the fin 22 and the side plate 23 is good, and these superposition operations can be easily performed. . Then, the fins 22 are laminated in this way, and the flow path 28 is formed by the polymerized through holes 26 and 29, and the end portions 31 of the adjacent flow paths 28 are connected to each other by the bend pipe 24. The conduit 25 is connected to the end 32, and the rising portions 27, 30 and the connecting portions of the rising portions 27, 30 and the bend pipe 24 and the conduit 25 are integrally brazed and bonded. As described above, each of the rising portions 27 and 30 is formed so as to be inclined toward the flow path 28, and further, since the clad material is used for each component, the brazing is good and the brazing property is improved. Can do.

  Next, a tubeless heat exchanger 41 according to a second embodiment of the present invention will be described with reference to FIGS. 5 and 6. In addition, about the structure equivalent to the tubeless heat exchanger 21 which concerns on above-mentioned 1st Embodiment, in order to simplify description, in FIG.5 and FIG.6, the code | symbol same as the code | symbol in FIGS. The detailed explanation is omitted.

  An elongated plate-like side plate 42 is provided on both sides of the laminated fins 22, and through holes 43 are formed in the side plates 42 so as to communicate with the through holes 26 of the fins 22. An elongated plate-like bend plate 44 is provided outside the side plate 42, and the bend plate 44 is fixed to the side plate 42 and integrated with the side plate 42. A raised portion 45 is formed on the bend plate 44 so as to protrude outward, and a communication passage 46 is formed between the raised portion 45 and the side plate 42 to communicate between the adjacent flow paths 28. The bend plate 44 is provided with a conduit connection hole 47 at a position corresponding to the end 32 of the flow path 28.

  In the case of the present embodiment, the through holes 26 and 43 of the fins 22 and the side plates 42 are exchanged as shown in FIG. 7 or FIG. 8 without exchanging the bend plates 44 that connect the ends of the flow paths 28 to each other. The diameter and the arrangement pitch of the flow path 28 can be easily and freely changed simply by changing the diameter and the arrangement pitch. Therefore, in this case, since the flow distribution of the internal fluid can be easily and freely changed according to the pressure loss and the circulation amount of the internal fluid, optimal flow control can be performed, and it is troublesome to change the flow path 28. Therefore, the cost can be reduced.

  When assembling the tubeless heat exchanger 41 described above, as shown in FIG. 6, the side plate 42 and the bend plate 44 integrated in advance are assembled on both sides of the laminated fin 22, integrally brazed, and joined. As a result, the flow path 28 is formed by the laminated fins 22, and the end portions 31 of the adjacent flow paths 28 are connected by the bend plate 44. Thus, since the side plate 42 and the bend plate are integrated in advance, the number of assembling steps can be greatly reduced, and the assembling work can be simplified.

  In addition, the member which connects between the adjacent flow paths 28 is not limited to the bend pipe 24 and the bend plate 44 illustrated in the first and second embodiments described above, and is connected by a box-shaped member. For example, connecting members having other shapes and structures may be used.

  The connecting member is not only used for connecting adjacent flow paths, but also, for example, headers provided on both sides of the side plate so as to connect three or more or all the flow paths 28 together. May be.

It is sectional drawing which shows the tubeless heat exchanger which concerns on the 1st Embodiment of this invention. It is a top view which shows the fin in the 1st Embodiment of this invention. It is sectional drawing which shows the fin in the 1st Embodiment of this invention. It is a side view which shows another example of the bend pipe | tube in the 1st Embodiment of this invention. It is sectional drawing which shows the tubeless heat exchanger which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the assembly procedure of the tubeless heat exchanger which concerns on the 2nd Embodiment of this invention. It is a top view which shows the fin in the 2nd Embodiment of this invention. It is a top view which shows another example of the fin in the 2nd Embodiment of this invention. It is sectional drawing which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Tubeless heat exchanger 22 Fin 24 Bend pipe 26 Through-hole 27 Rising part 28 Flow path 31 End part 33 Expansion part 34 Tip part 41 Tubeless heat exchanger 42 Side plate 43 Through-hole 44 Bend plate

Claims (8)

A plurality of flow paths are formed by laminating fins having rising portions along the peripheral edges of the plurality of through holes, and the ends of the flow paths are connected by a connecting member. A tubeless heat exchanger. The tubeless heat exchanger according to claim 1, wherein the fin and the connecting member are formed of a clad material so as to be integrally brazed. The tubeless heat exchanger according to claim 1 or 2, wherein the rising portions of the fins are formed to be inclined toward the flow path so that the rising portions can be polymerized. The tubeless heat exchanger according to any one of claims 1 to 3, wherein the connecting member is a bend pipe that connects adjacent ends of the flow path. 5. The tubeless heat exchanger according to claim 4, wherein the bend pipe has a bulging portion at both ends, and a tip side portion of the bulging portion is formed in a tapered shape. The connecting member is a bend plate that connects adjacent ends of the flow path, and the bend plate is fixed to the outside of the side plate provided on both sides of the laminated fins, and is integrated with the side plate. The tubeless heat exchanger according to any one of claims 1 to 3. The tubeless heat exchanger according to claim 6, wherein the diameter of each through hole of the fin is variable. The tubeless heat exchanger according to claim 6 or 7, wherein an arrangement pitch between the through holes of the fins is variable.

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